
Pepper vodka is a flavored vodka infused with hot chili or true peppercorns, carrying a pepper flavor and often heat.
Capsaicin heat on a neutral base, and the heat is what has to be measured rather than poured: it keeps building after it goes in. Infusing plain vodka gives the same thing with the strength under control.
Peppercorn vodka (pertsovka)
Peppercorn vodka is steeped on true Piper peppercorns, sometimes with honey, which gives a warm culinary spice; chili vodka is steeped on pods for capsaicin heat. Both are sold as "pepper vodka" and they are different products — one seasons a Bloody Mary, the other burns it.
Piperine is heat-stable and shelf-stable, so pepper vodka is the other flavored bottle that genuinely lasts. Keep it closed and away from light and it will taste the same in a year.